On Wed, 11 Jun 2003, Christian Stieber wrote:

> Hi,
> 
> for some reason the USB port on my Linux box is almost unusable :-(
> 
> The story:
>  - I plug in an external harddisk (speaks USB2, but I only have USB1 ports ---
>    don't know whether this matters here)
>  - device is recognized by the kernel, the pseudo-SCSI-device is created
>  - I can mount the disk
> 
> Now, when I want to remove it again:
>  - Sync
>  - I unmount the disk
>  - Sync again, just in case
>  - I unplug the device
> 
> The reaction is the following line in syslog:
> Jun 10 00:50:32 Gatekeeper kernel: uhci.c: d000: host controller halted. very bad
> 
> After that, when I plug the device back in and mount it the mount locks up in
> the kernel (kill -9 doesn't help). Don't know whether I could mount other
> disks; unmounting still seemed to work --- I got a clean shutdown.
> 
> The box is a 440BX mainboard, running a 2.4.20 kernel, using the "alternate
> UHCI driver" --- the help item talks about another UHCI driver, but this
> seems to be another case of the help not being uptodate: I didn't see it.

It is still there. Did you have one compiled into the kernel?
 
> So, the question is: am I doing something wrong (do I need to somehow tell
> the kernel that I'm going to unplug the device?), or is there a patch for
> this bug? Back then it looked like a good idea to plug the thing into
> the server, since 99% of the stuff is going through there anyway atm...
> 
> Thanks,
>   Christian
> 
> 
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